Headbox having adjustable flow passages
US4285767A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1978 |
| Grant date | Aug 25, 1981 |
| Priority date | — |
| Expiry date | Mar 13, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F11/002
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A headbox for supplying a stock consisting of a generated liquid foam suspension of fibers or a high consistency paper making stock including a slice nozzle having a slice opening and a slice chamber having first and second slice flow passages arranged of a set of stepped surfaces leading to the slice nozzle with one set of the surfaces of the slice chamber mounted on a movable block to increase or decrease the size of the passages of the slice chamber, said stepped surfaces shaped to generate a turbulent expansion and shearing action on the foam for a regenerative process, and a tube bank and header chamber delivering foam to the slice chamber passages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.